1
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Xu X, Feng H, Van der Eycken EV. Microwave-Assisted Cu(I)-Catalyzed Synthesis of Unsymmetrical 1,4-Diamino-2-butynes via Cross-A 3-Coupling/Decarboxylative A 3-Coupling. J Org Chem 2021; 86:14036-14043. [PMID: 33890472 DOI: 10.1021/acs.joc.1c00537] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
1,4-Diamino-2-butynes display both chemical and physiological properties. Here a highly efficient synthesis avenue to generate unsymmetric 1,4-diamino-2-butynes has been developed by microwave-assisted Cu(I)-catalyzed cross-A3-coupling/decarboxylative coupling of two different amines, formaldehyde, and propiolic acid through a domino process. This multicomponent reaction provides a series of target products in moderate to good yields with high chemoselectivity.
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Affiliation(s)
- Xianjun Xu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium
| | - Huangdi Feng
- College of Chemistry and Chemical Engineering & Shanghai Engineering Research Center of Textile Chemistry and Cleaner Production, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.,Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia
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2
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Saha M, Das AR. Nanocrystalline ZnO: A Competent and Reusable Catalyst for the Preparation of Pharmacology Relevant Heterocycles in the Aqueous Medium. CURRENT GREEN CHEMISTRY 2020. [DOI: 10.2174/2213346107666200218122718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
:Nanoparticle catalyzed synthesis is a green and convenient method to achieve most of the chemical transformations in water or other green solvents. Nanoparticle ensures an easy isolation process of catalyst as well as products from the reaction mixture avoiding the hectic work up procedure. Zinc oxide is a biocompatible, environmentally benign and economically viable nanocatalyst with effectivity comparable to the other metal nanocatalyst employed in several reaction strategies. This review mainly focuses on the recent applications of zinc oxide in the synthesis of biologically important heterocyclic molecules under sustainable reaction conditions.:Application of zinc oxide in organic synthesis: Considering the achievable advantages of this nanocatalyst, presently several research groups are paying attention in anchoring zincoxide or its modified structure in several types of organic conversions e.g. multicomponent reactions, ligand-free coupling reactions, cycloaddition reaction, etc. The advantages and limitations of this nanocatalyst are also demonstrated. The present study aims to highlight the recent multifaceted applications of ZnO towards the synthesis of diverse heterocyclic motifs. Being a promising biocompatible nanoparticle, this catalyst has an important contribution in the fields of synthetic chemistry and medicinal chemistry.
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Affiliation(s)
- Moumita Saha
- Department of Chemistry, University of Calcutta, Kolkata-700009, India
| | - Asish R. Das
- Department of Chemistry, University of Calcutta, Kolkata-700009, India
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3
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Alyabyev SB, Beletskaya IP. Gold as a catalyst. Part II. Alkynes in the reactions of carbon–carbon bond formation. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4815] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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4
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Practical synthesis of silyl-protected and functionalized propargylamines using nanostructured Ag/TiO2 and Pt/TiO2 as active recyclable catalysts. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0604-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Carita Correra T, Santos Fernandes A, Mota Reginato M, Colucci Ducati L, Berden G, Oomens J. Probing the geometry reorganization from solution to gas-phase in putrescine derivatives by IRMPD, 1H-NMR and theoretical calculations. Phys Chem Chem Phys 2017; 19:24330-24340. [DOI: 10.1039/c7cp04617k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Geometry reorganization of ESI formed ions are demonstrated and explicit calculations of the solution phase are shown to be relevant.
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Affiliation(s)
- Thiago Carita Correra
- Department of Fundamental Chemistry
- Institute of Chemistry
- University of São Paulo
- São Paulo
- Brazil
| | - André Santos Fernandes
- Department of Fundamental Chemistry
- Institute of Chemistry
- University of São Paulo
- São Paulo
- Brazil
| | - Marcelo Mota Reginato
- Department of Fundamental Chemistry
- Institute of Chemistry
- University of São Paulo
- São Paulo
- Brazil
| | - Lucas Colucci Ducati
- Department of Fundamental Chemistry
- Institute of Chemistry
- University of São Paulo
- São Paulo
- Brazil
| | - Giel Berden
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | - Jos Oomens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
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6
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Feng H, Zhao P, Huang L, Sun Z, Tong M. Highly Selective Synergistic Copper(I/II)-Catalyzed A3Cross Coupling/Decarboxylative A3Domino Reactions in Water. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600524] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Huangdi Feng
- College of Chemistry and Chemical Engineering; Shanghai University of Engineering Science; 333 Longteng Road Shanghai 201620 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Panfeng Zhao
- College of Chemistry and Chemical Engineering; Shanghai University of Engineering Science; 333 Longteng Road Shanghai 201620 China
| | - Liliang Huang
- College of Chemistry and Chemical Engineering; Shanghai University of Engineering Science; 333 Longteng Road Shanghai 201620 China
| | - Zhihua Sun
- College of Chemistry and Chemical Engineering; Shanghai University of Engineering Science; 333 Longteng Road Shanghai 201620 China
| | - Minchao Tong
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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7
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Suchý M, Milne M, Elmehriki AAH, McVicar N, Li AX, Bartha R, Hudson RHE. Introduction of Peripheral Carboxylates to Decrease the Charge on Tm3+ DOTAM-Alkyl Complexes: Implications for Detection Sensitivity and in Vivo Toxicity of PARACEST MRI Contrast Agents. J Med Chem 2015. [DOI: 10.1021/acs.jmedchem.5b00621] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Mojmír Suchý
- Department
of Chemistry, The University of Western Ontario, Chemistry Building, London, Ontario N6A 5B7, Canada
- Department
of Medical Biophysics, The University of Western Ontario, London, Ontario N6A 5K8, Canada
| | - Mark Milne
- Department
of Chemistry, The University of Western Ontario, Chemistry Building, London, Ontario N6A 5B7, Canada
| | - Adam A. H. Elmehriki
- Department
of Chemistry, The University of Western Ontario, Chemistry Building, London, Ontario N6A 5B7, Canada
| | - Nevin McVicar
- Department
of Medical Biophysics, The University of Western Ontario, London, Ontario N6A 5K8, Canada
| | - Alex X. Li
- Department
of Medical Biophysics, The University of Western Ontario, London, Ontario N6A 5K8, Canada
| | - Robert Bartha
- Department
of Medical Biophysics, The University of Western Ontario, London, Ontario N6A 5K8, Canada
| | - Robert H. E. Hudson
- Department
of Chemistry, The University of Western Ontario, Chemistry Building, London, Ontario N6A 5B7, Canada
- Centre
for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 5B7, Canada
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8
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Moghaddam FM, Ayati SE, Hosseini SH, Pourjavadi A. Gold immobilized onto poly(ionic liquid) functionalized magnetic nanoparticles: a robust magnetically recoverable catalyst for the synthesis of propargylamine in water. RSC Adv 2015. [DOI: 10.1039/c5ra02974k] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Supported gold(iii) on poly(ionic liquid) coated on magnetic nanoparticles produced a highly active, stable, recoverable and high loading for the synthesis of propargylamines (A3 coupling reaction) under green conditions.
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Affiliation(s)
- Firouz Matloubi Moghaddam
- Laboratory of Organic Synthesis and Natural Products
- Department of Chemistry
- Sharif University of Technology
- Tehran
- Iran
| | - Seyed Ebrahim Ayati
- Laboratory of Organic Synthesis and Natural Products
- Department of Chemistry
- Sharif University of Technology
- Tehran
- Iran
| | - Seyed Hassan Hosseini
- Polymer Research Laboratory
- Department of Chemistry
- Sharif University of Technology
- Tehran
- Iran
| | - Ali Pourjavadi
- Polymer Research Laboratory
- Department of Chemistry
- Sharif University of Technology
- Tehran
- Iran
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9
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Oyster shell waste supported CuCl2 for aldehyde-alkyne-amine coupling reaction to propargylamines. CHINESE JOURNAL OF CATALYSIS 2014. [DOI: 10.1016/s1872-2067(14)60195-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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First Pre-Functionalised Polymeric Aromatic Framework from Mononitrotetrakis(iodophenyl)methane and its Applications. Chemistry 2014; 20:5111-20. [DOI: 10.1002/chem.201304163] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/22/2014] [Indexed: 11/07/2022]
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11
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Gagnon H, Beauchemin S, Kwiatkowska A, Couture F, D'Anjou F, Levesque C, Dufour F, Desbiens AR, Vaillancourt R, Bernard S, Desjardins R, Malouin F, Dory YL, Day R. Optimization of furin inhibitors to protect against the activation of influenza hemagglutinin H5 and Shiga toxin. J Med Chem 2013; 57:29-41. [PMID: 24359257 DOI: 10.1021/jm400633d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Proprotein convertases (PCs) are crucial in the processing and entry of viral or bacterial protein precursors and confer increased infectivity of pathogens bearing a PC activation site, which results in increased symptom severity and lethality. Previously, we developed a nanomolar peptide inhibitor of PCs to prevent PC activation of infectious agents. Herein, we describe a peptidomimetic approach that increases the stability of this inhibitor for use in vivo to prevent systemic infections and cellular damage, such as that caused by influenza H5N1 and Shiga toxin. The addition of azaβ(3)-amino acids to both termini of the peptide successfully prevented influenza hemagglutinin 5 fusogenicity and Shiga toxin Vero toxicity in cell-based assays. The results from a cell-based model using stable shRNA-induced proprotein convertase knockdown indicate that only furin is the major proprotein convertase required for HA5 cleavage.
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Affiliation(s)
- Hugo Gagnon
- Institut de Pharmacologie de Sherbrooke (IPS) and Département de Chirurgie/Urologie, Faculté de Médecine et des Sciences de la Santé (FMSS), Université de Sherbrooke , 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
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12
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Kwiatkowska A, Couture F, Levesque C, Ly K, Desjardins R, Beauchemin S, Prahl A, Lammek B, Neugebauer W, Dory YL, Day R. Design, synthesis, and structure-activity relationship studies of a potent PACE4 inhibitor. J Med Chem 2013; 57:98-109. [PMID: 24350995 DOI: 10.1021/jm401457n] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
PACE4 plays an important role in the progression of prostate cancer and is an attractive target for the development of novel inhibitor-based tumor therapies. We previously reported the design and synthesis of a novel, potent, and relatively selective PACE4 inhibitor known as a Multi-Leu (ML) peptide. In the present work, we examined the ML peptide through detailed structure-activity relationship studies. A variety of ML-peptide analogues modified at the P8-P5 positions with leucine isomers (Nle, DLeu, and DNle) or substituted at the P1 position with arginine mimetics were tested for their inhibitory activity, specificity, stability, and antiproliferative effect. By incorporating d isomers at the P8 position or a decarboxylated arginine mimetic, we obtained analogues with an improved stability profile and excellent antiproliferative properties. The DLeu or DNle residue also has improved specificity toward PACE4, whereas specificity was reduced for a peptide modified with the arginine mimetic, such as 4-amidinobenzylamide.
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Affiliation(s)
- Anna Kwiatkowska
- Institut de Pharmacologie de Sherbrooke, Department of Surgery/Urology Division, Université de Sherbrooke , 3001 12th Avenue North, Sherbrooke, Québec, J1H 5N4, Canada
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13
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Feng H, Ermolat'ev DS, Song G, Van der Eycken EV. Synthesis of symmetric 1,4-diamino-2-butynes via a Cu(I)-catalyzed one-pot A3-coupling/decarboxylative coupling of a propiolic acid, an aldehyde, and an amine. J Org Chem 2012; 77:5149-54. [PMID: 22563934 DOI: 10.1021/jo300562j] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A novel microwave-assisted approach for the one-pot Cu(I)-catalyzed A(3)-coupling/decarboxylative coupling (PA(2)-coupling) of a propiolic acid, an aldehyde, and an amine, resulting in the formation of diversely substituted 1,4-diamino-2-butynes,is described. It is noteworthy that this new multicomponent coupling provides an efficient access to introduce alkyl and aryl group at the 1,4-position of the 1,4-diamino-2-butynes.
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Affiliation(s)
- Huangdi Feng
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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14
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Villaverde G, Corma A, Iglesias M, Sánchez F. Heterogenized Gold Complexes: Recoverable Catalysts for Multicomponent Reactions of Aldehydes, Terminal Alkynes, and Amines. ACS Catal 2012. [DOI: 10.1021/cs200601w] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gonzalo Villaverde
- Instituto Ciencia de Materiales de Madrid, CSIC, C/Sor Juana Inés
de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain
| | - Avelino Corma
- Instituto Tecnología Química, UPV-CSIC, Avda los Naranjos, s/n, 46022
Valencia, Spain
| | - Marta Iglesias
- Instituto Ciencia de Materiales de Madrid, CSIC, C/Sor Juana Inés
de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain
| | - Félix Sánchez
- Instituto Química Orgánica General, CSIC, C/Juan de la Cierva,
3, 28006 Madrid, Spain
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15
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Kolleth A, Christoph S, Arseniyadis S, Cossy J. Kinetic resolution of propargylamines via a highly enantioselective non-enzymatic N-acylation process. Chem Commun (Camb) 2012; 48:10511-3. [DOI: 10.1039/c2cc35719d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Xu Z, Yu X, Feng X, Bao M. Propargylamine Synthesis by Copper-Catalyzed Oxidative Coupling of Alkynes and Tertiary Amine N-Oxides. J Org Chem 2011; 76:6901-5. [DOI: 10.1021/jo201059h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhanwei Xu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiaoqiang Yu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiujuan Feng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Ming Bao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
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17
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Nguyen T, Sakasegawa Y, Doh-Ura K, Go ML. Anti-prion activities and drug-like potential of functionalized quinacrine analogs with basic phenyl residues at the 9-amino position. Eur J Med Chem 2011; 46:2917-29. [PMID: 21531054 DOI: 10.1016/j.ejmech.2011.04.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 04/02/2011] [Accepted: 04/04/2011] [Indexed: 11/16/2022]
Abstract
In this paper, we report the synthesis and cell-based anti-prion activity of quinacrine analogs derived by replacing the basic alkyl side chain of quinacrine with 4-(4-methylpiperazin-I-yl)phenyl, (1-benzylpiperidin-4-yl) and their structural variants. Several promising analogs were found that have a more favorable anti-prion profile than quinacrine in terms of potency and activity across different prion-infected murine cell models. They also exhibited greater binding affinities for a human prion protein fragment (hPrP(121-231)) than quinacrine, and had permeabilities on the PAMPA-BBB assay that fall within the range of CNS permeant candidates. When evaluated on bidirectional assays on a Pgp overexpressing cell line, one analog was less susceptible to Pgp efflux activity compared to quinacrine. Taken together, the results point to an important role for the substituted 9-amino side chain attached to the acridine, tetrahydroacridine and quinoline scaffolds. The nature of this side chain influenced cell-based potency, PAMPA permeability and binding affinity to hPrP(121-231).
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Affiliation(s)
- Thuy Nguyen
- Department of Pharmacy, Faculty of Science, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore
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18
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Reversible inactivation of bovine plasma amine oxidase by cysteamine and related analogs. Biochem Biophys Res Commun 2010; 403:442-6. [PMID: 21094148 DOI: 10.1016/j.bbrc.2010.11.052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2010] [Accepted: 11/13/2010] [Indexed: 11/23/2022]
Abstract
Cysteamine (1) was reported many years ago to reversibly inhibit lentil seedling amine oxidase, through the formation of a complex with thioacetaldehyde, the turnover product of 1. Herein, cysteamine (1) and its analogs 2-(methylamino)ethanethiol (3) and 3-aminopropanethiol (6) were found to be reversible inhibitors of bovine plasma amine oxidase (BPAO), but 2-(methylthio)ethylamine (7) was determined to be a weak irreversible inhibitor of BPAO. Based on our results, indicating the necessity of a sulfhydryl-amine for reversible inactivation of BPAO, the failure of inhibited BPAO to recover activity after gel filtration, the first-order kinetics of activity recovery upon dialysis, and 2,4,6-trihydroxyphenylalanine quinine (TPQ) cofactor transformation which indicated from the results of phenylhydrazine titration and substrate protection, we propose a mechanism for the reversible inactivation of BPAO by 1 involving the formation of a cofactor adduct, thiazolidine, between BPAO and 1.
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19
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Patil MK, Keller M, Reddy BM, Pale P, Sommer J. Copper Zeolites as Green Catalysts for Multicomponent Reactions of Aldehydes, Terminal Alkynes and Amines: An Efficient and Green Synthesis of Propargylamines. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800359] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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20
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Sebela M, Tylichová M, Pec P. Inhibition of diamine oxidases and polyamine oxidases by diamine-based compounds. J Neural Transm (Vienna) 2007; 114:793-8. [PMID: 17385064 DOI: 10.1007/s00702-007-0690-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Accepted: 11/20/2006] [Indexed: 11/25/2022]
Abstract
This review reports on inhibitors of copper-containing amine oxidases and flavoprotein polyamine oxidases, which are structurally based on diamines. In the introduction, basic characteristics and classification of amine oxidases are described together with the significance of their synthetic inhibitors. The following text is divided into several chapters, which deal with diaminoketones, aza-diamines, unsaturated diamine analogs and diamines with heterocyclic substituents. Then it continues with diamine- and agmatine-based inhibitors of polyamine oxidases. Each chapter gives detailed information on the inhibition mode, potency and structural relationships. The conclusion points out possible roles of mechanism-based inhibitors of amine oxidases in physiological and medicinal research.
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Affiliation(s)
- M Sebela
- Department of Biochemistry, Faculty of Science, Palacký University, Olomouc, Czech Republic
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21
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Chiosis G, Aguirre J, Nicchitta CV. Synthesis of Hsp90 dimerization modulators. Bioorg Med Chem Lett 2006; 16:3529-32. [PMID: 16621545 DOI: 10.1016/j.bmcl.2006.03.092] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2005] [Revised: 03/27/2006] [Accepted: 03/28/2006] [Indexed: 12/24/2022]
Abstract
The synthesis and evaluation of several chemical modulators of heat shock protein 90 (Hsp90) dimerization is presented. These agents may represent useful tools to study the importance of N-terminal dimerization and also to determine subunit interface(s) in Hsp90.
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Affiliation(s)
- Gabriela Chiosis
- Program in Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
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23
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Ronchi S, Prosperi D, Thimon C, Morin C, Panza L. Synthesis of mono- and bisglucuronylated carboranes. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.11.059] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Wilmot CM, Saysell CG, Blessington A, Conn DA, Kurtis CR, McPherson MJ, Knowles PF, Phillips SEV. Medical implications from the crystal structure of a copper-containing amine oxidase complexed with the antidepressant drug tranylcypromine. FEBS Lett 2004; 576:301-5. [PMID: 15498552 DOI: 10.1016/j.febslet.2004.09.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2004] [Revised: 08/26/2004] [Accepted: 09/10/2004] [Indexed: 11/29/2022]
Abstract
The X-ray crystal structure of the copper-containing quinoprotein amine oxidase from E. coli has been determined in complex with the antidepressant drug tranylcypromine to 2.4 A resolution. The drug is a racemic mix of two enantiomers, but only one is seen bound to the enzyme. The other enantiomer is not acting as a substrate for the enzyme as no catalytic activity was detected when the enzyme was initially exposed to the drug. The inhibition of human copper amine oxidases could be a source of side-effects in its use as an antidepressant to inhibit the flavin-containing monoamine oxidases in the brain.
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Affiliation(s)
- Carrie M Wilmot
- Astbury Centre for Structural Molecular Biology, School of Biochemistry and Molecular Biology, University of Leeds, Leeds LS2 9JT, UK.
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25
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Lamplot Z, Sebela M, Malon M, Lenobel R, Lemr K, Havlis J, Pec P, Qiao C, Sayre LM. 1,5-Diamino-2-pentyne is both a substrate and inactivator of plant copper amine oxidases. ACTA ACUST UNITED AC 2004; 271:4696-708. [PMID: 15606757 DOI: 10.1111/j.1432-1033.2004.04434.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
1,5-diamino-2-pentyne (DAPY) was found to be a weak substrate of grass pea (Lathyrus sativus, GPAO) and sainfoin (Onobrychis viciifolia, OVAO) amine oxidases. Prolonged incubations, however, resulted in irreversible inhibition of both enzymes. For GPAO and OVAO, rates of inactivation of 0.1-0.3 min(-1) were determined, the apparent KI values (half-maximal inactivation) were of the order of 10(-5) m. DAPY was found to be a mechanism-based inhibitor of the enzymes because the substrate cadaverine significantly prevented irreversible inhibition. The N1-methyl and N5-methyl analogs of DAPY were tested with GPAO and were weaker inactivators (especially the N5-methyl) than DAPY. Prolonged incubations of GPAO or OVAO with DAPY resulted in the appearance of a yellow-brown chromophore (lambda(max) = 310-325 nm depending on the working buffer). Excitation at 310 nm was associated with emitted fluorescence with a maximum at 445 nm, suggestive of extended conjugation. After dialysis, the color intensity was substantially decreased, indicating the formation of a low molecular mass secondary product of turnover. The compound provided positive reactions with ninhydrin, 2-aminobenzaldehyde and Kovacs' reagents, suggesting the presence of an amino group and a nitrogen-containing heterocyclic structure. The secondary product was separated chromatographically and was found not to irreversibly inhibit GPAO. MS indicated an exact molecular mass (177.14 Da) and molecular formula (C10H15N3). Electrospray ionization- and MALDI-MS/MS analyses yielded fragment mass patterns consistent with the structure of a dihydropyridine derivative of DAPY. Finally, N-(2,3-dihydropyridinyl)-1,5-diamino-2-pentyne was identified by means of 1H- and 13C-NMR experiments. This structure suggests a lysine modification chemistry that could be responsible for the observed inactivation.
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Affiliation(s)
- Zbynek Lamplot
- Department of Biochemistry, Faculty of Science, Palacky University, Olomouc, Czech Republic
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